Added CodeCov shield (#4)

README.md

@@ -4,6 +4,10 @@
 
 <p align="center">
     <img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/ppeelen/TibberSwift/build-and-test.yml" />
+    <a href="https://app.codecov.io/gh/ppeelen/TibberSwift">
+        <img alt="Codecov" src="https://img.shields.io/codecov/c/github/ppeelen/TibberSwift">
+    </a>
+    <br/>
     <img src="https://img.shields.io/badge/swift-5.9-orange.svg" alt="Swift 5.9" />
     <img src="https://img.shields.io/badge/platform-SwiftUI-blue.svg" alt="Swift UI" title="Swift UI" />
     <img src="https://img.shields.io/github/license/ppeelen/TibberSwift" alt="MIT License" />
@@ -13,7 +17,7 @@
         <img alt="Mastodon Follow" src="https://img.shields.io/mastodon/follow/109416415024329828?domain=https%3A%2F%2Fmastodon.nu&style=social&label=Mastodon%3A%20%40peelen" />
     </a>
     <a href="https://twitter.com/ppeelen" target="_blank">
-        <img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/swiftislandnl?label=PPeelen" alt="Twitter: @ppeelen" title="Twitter: @ppeelen" />
+        <img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/swiftislandnl?label=PPeelen" alt="X/Twitter: @ppeelen" title="X: @ppeelen" />
     </a>
 </p>